how to install bprojection addon
Follow these steps:


Open this link
Select all text and open any text editor then paste it in it.
Save it with this name space_view3d_paint_bprojection.py in Blender's add-ons folder:
Example for Linux:


/home/userA/.blender/2.78/scripts/addons/

Example for Windows:

C:\Users\%username%\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons


Example for macOS:

/Users/%username%/blender/blender.app/Contents/Resources/2.78/scripts/addons



Open User Preferences (Ctrl+Alt+U) and under Add-ons, click Install from File. Then navigate to the file you downloaded and select it.





It should now appear in the window and you can tick the checkbox in the upper right to enable it.




If you would like to have the add-on enabled every time you start Blender, click Save User Settings at the bottom.